Mixing and combining device for gas-engines.



No. 819,239. vPATENTED MAY 1, 1906.

- L. J. MARKS.

MIXING AND COMBINING DEVICE FOR GAS ENGINES.

APPLICATION FILED MAY 20, 1905.

,, HI, v I IT UNITED sTArEs PATENT OFFICE.

MIXING AND COMBINING DEVICE FOR GAS-ENGINES.

Specification of Letters Patent.

Patented May 1,1906.

Application filed Ma 20,1905. 'SrialNo-26L347. I i

To all whom it may concern: Y

Be it known that I, LEONARD J. MARKS, a citizen of the United States of America, re siding at San Francisco, county of San Francisco, and State of California, have invented certain newand useful Improvements in Mixing and Combining Devices for Gas-Engines; and Ihereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to certain improved devices for modifying, mixing, and combin ing the charges of fuel-gas supplied to hydrocarbon motive engines, especially those in which the fuel-gas is provided by volatilizing crude mineral oils by heat. 4

My improvements consist in technically called a mixing and combining valve, placed, between the 'volatilizing or. vaporizing apparatus and the engine to be supplied, its functions being"t'o admitflair,

\ of operating hydrocarbon-oil engines.

Water, to mix and cool the fuel-gas, also to,

supply some volatile hydrocarbon-that can be employed to start the engine independently and in advance of using the oil fuel.

The objects of my invention-are to regulate the amount of air supplied to and mixed with the fuel-gas, to control the temperature of the same, and to provide a separate supply of fuel-gas to be employed in starting, thereby improving the efiiciency and convenience To these ends I provide devices as shown in the drawings herewith. a

Figure I is an elevation of the various parts connected,showing their arrangement; Fig.

II,:"an enlarged vertical section through the mixing and regulating devices that form the subject of my invention. V

In operating motive engines impelled by gaseous or explosive fuel derived from crude mineral oil the latter is volatilized by heat, usually by the hot waste gas from the engine conducted to and around a chamber or vessel commonly called a vaporizer. The vapor or gas after being combined with air is then conducted to the motive cylinder and is consumed in charges in the usual manner of engines of this kind.. The hot vapor or .gas thus produced, if not reduced in temperature before entering .the motive cylinder, is un-'- duly hot, expandedin volume, dry and less efi'ective than if saturated to some extent a structure,

with moisture, also is liable to produce pre mature ignition. 'Moreover, when the mineral oil is volatilized by heat derived from the motive cylinder an auxiliary supply of gaseous fuel has to be provided to start and heat the engine. For these several functions I provide aunitary dev'ce. (Illustrated in section by Fig. II of the drawin'gs and hereinafter described.)

Referring to the drawings and at first to Fig. I, 1 represents the cylinder of a gas motive engine, 2 the volatilizing or vaporizing chamber, and*3 a pipe through which the hot spent gases are conducted from the engine 1 to the chamber 2.

A discharge-pipe 43 conducts away the waste'gases after they have passed the chamher or vessel 2. At 5 is a tank and connecting-pipe for crude mineral oil.

7 is a tank for gasolene or other-volatile hydrocarbon fluid easily carbureted or. evaporated, and 8' a common valve or cook to chamber 2, admits water to cool the mixture of fuel-gas and air,, and admits when required a volatile hydrocarbon to supply the motive engine until the latter becomes heat ed and the volatiliz'ing-chamber 2 begins to act. The mixing and combining device 10 is made with an integral body 14, adapted to fit upon and o en-into the supply-pipe. 9, as shown in Fig.

15 is the valve that seats upward,.as shown in Fig. II, and slides on a stem 17 by means of a tubular extension 18. This extension 18 fits loosely around the stem 17 at the top and is guided at the bottom by-a head or enlarge-- ment. 19' of the stem that also acts as a pneu matic cushion when the valve 15 is closed suddenly. A helical spring 20 bears against the head 19 of the stem 17 and'upward against the valve 15 to sustain its weight and offer a ICC nor,

moderate resistance to its 0 ening movement. closed at the bottom by screw-plug 22, and the head 19 of the stem 17 has a slotat 23 for use when it is inserted. The stem 17 passes loosely through the distance-collar 31 and is screw-threaded in the seat 24. The latter can be made integral with the main shell 14 or be inserted.

25 is a revoluble cap. that fits loosely over a nipple 27 of the main body 14, the two being piercedwith registering passages 28, that admit an amount of air regulated by the position of the cap 25. A screw 29 is provided to hold the cap 25 in a-fixed position when that is required, and the edge 30 is preferably milled to afford a hold for convenient turning. Around the interior of the nipple 27 is placed a fine screen 32 to revent the entry of any foreign substance w1th the air. The cap25 is held down elastically by the hand-nut 33 and a coil-spring-34. This nut 33 when screwed down bears upon a distance-collar 31, jamming and locking the stem 17, a serrated or milled cap 35 on the latter serving to turn 'and adjust it and the range of the valve 15 from the exterior when in use. Water is admitted through an aperture 37, opening into the seat of the valve 15, apipe 13 connecting to the cooling water-spaces around the motive c linder 1. A similar aperture 38 opens into t e seat of the valve 15 for injecting a volatile hydrocarbon, such as gasolene, from the tank 7 through the pipe'12, The stem 17 has a small hole drilled through its center, connecting with the hole 39 in the head or piston 19 to oil and-air the same and maintain a free movement thereof. i

In operating'and when the engine 1 is to be started the cock 8 is closed and the cock 40 is opened and volatile fluid is admitted through the aperture 38,, the valve 15 being pressed down for that purpose. The cap 25 is turned to admit air to the chamber 42 and to the supply-pipe 9, from where it is drawn into the cylinder 1 and ignited. As soon as the engine has been in o eration long enough to heat the chamber 2 y reason of the hot waste gases passing through the pipe 3 the resulting vapor or gas flows through the pipe 9. the cock 8 is opened and the one 40 is.

closed, and the engine begins to operateby the fuel-gas from the volatilizing-chamber 2. When the hot vapor reaches the mixingvalve 10, it is carbureted and partially cooled by the admission of air through the passages through the cook 42 and aperture 37 to further.

coolithe fuel-gas, and the engine goes on with 28 and the valve 15. Water is admitted The extension 18 of tie valve 15 is its normal charges, the valve 15 opening by suction at each working stroke.

Having thus explained the objects and nature of my invention and the manner of its operation, what I claim as new, and desire to secure by Letters Patent, is

1. In an oil-consuming gas-engine, a volatilizing-chamber, a cylinder, a mixing device interposed between said volatilizing-chamber and the engine-cylinder, said device having an automatically-opening and closing airvalve, an inlet for Water controlled thereby, and variably-registering air-apertures for admitting air to said valve in regulated quantity, substantially'as specified.

2. In an oil-consuming gas-engine, a volatilizing-chamber, a cylinder, a mixing device interposed between said volatilizing-chamber and the cylinder, said device having adjustable means for admitting air in regulated quantities, an inlet for volatile hydrocarbon, to mingle with the admitted air and temporarily supply fuel-gas to the engine in starting, a tank for the volatile hydrocarbon, conducting-pi es from said tank to the mixing device, an means to regulate the amount of volatile fluid supplied, substantially as speci- 3. In an oil-consuming gas-engine, a volatilizing-chamber, a cylinder, a mixing device interposed between said volatilizing-chamber and the cylinder, said device having adjustable means for admitting air in regulated quantities, an inlet-way for liquid fuel, an inlet-way for water, means for supplying said fuel and water in regulated quantities, and an automatically opening and closing valve to admit and mix said fluids, substantially as specified.

4. In an oil-consuming gas-engine, a volatilizing-chamber, a cylinder, a mixing device interposed between said volatilizing-chamber and the cylinder, said device having adjustable means for admitting air in regulated quantities, adjustable means for supplying liquid fuel and for supplying water thereto in regulated uantities, and an automatically opening an closing valve for admitting and mixing saidfiuids, said valve being mounted on and guided by a central adjustable stem, accessible from the exterior, substantially as specified. l

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

- LEONARD J. MARKS. Witnesses:

ALF ED A. ENQUIST, ELMER WIOKES.

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